<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=2">
<meta name="theme-color" content="#222">
<meta name="generator" content="Hexo 5.4.0">


  <link rel="apple-touch-icon" sizes="180x180" href="/images/apple-touch-icon-next.png">
  <link rel="icon" type="image/png" sizes="32x32" href="/images/favicon-32x32-next.png">
  <link rel="icon" type="image/png" sizes="16x16" href="/images/favicon-16x16-next.png">
  <link rel="mask-icon" href="/images/logo.svg" color="#222">

<link rel="stylesheet" href="/css/main.css">



<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@5.15.2/css/all.min.css">
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/animate.css@3.1.1/animate.min.css">

<script class="hexo-configurations">
    var NexT = window.NexT || {};
    var CONFIG = {"hostname":"littlefxc.github.io","root":"/","images":"/images","scheme":"Mist","version":"8.2.2","exturl":false,"sidebar":{"position":"left","display":"post","padding":18,"offset":12},"copycode":false,"bookmark":{"enable":false,"color":"#222","save":"auto"},"fancybox":false,"mediumzoom":false,"lazyload":false,"pangu":false,"comments":{"style":"tabs","active":null,"storage":true,"lazyload":false,"nav":null},"motion":{"enable":true,"async":false,"transition":{"post_block":"fadeIn","post_header":"fadeInDown","post_body":"fadeInDown","coll_header":"fadeInLeft","sidebar":"fadeInUp"}},"prism":false,"i18n":{"placeholder":"搜索...","empty":"没有找到任何搜索结果：${query}","hits_time":"找到 ${hits} 个搜索结果（用时 ${time} 毫秒）","hits":"找到 ${hits} 个搜索结果"},"path":"/search.xml","localsearch":{"enable":true,"trigger":"auto","top_n_per_article":1,"unescape":false,"preload":false}};
  </script>
<meta name="description" content="分布式事务处理的XA规范(由 AP、RM、TM 组成):  其中应用程序（Application Program ，简称 AP）：AP 定义事务边界（定义事务开始和结束）并访问事务边界内的资源。 资源管理器（Resource Manager，简称 RM）：RM 管理计算机共享的资源，许多软件都可以去访问这些资源，资源包含比如数据库、文件系统、打印机服务器等。 事务管理器（Transaction M">
<meta property="og:type" content="article">
<meta property="og:title" content="MySQL分布式事务原理探究">
<meta property="og:url" content="http://littlefxc.github.io/2019/05/06/MySQL%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1%E5%8E%9F%E7%90%86%E6%8E%A2%E7%A9%B6/index.html">
<meta property="og:site_name" content="一年春又来">
<meta property="og:description" content="分布式事务处理的XA规范(由 AP、RM、TM 组成):  其中应用程序（Application Program ，简称 AP）：AP 定义事务边界（定义事务开始和结束）并访问事务边界内的资源。 资源管理器（Resource Manager，简称 RM）：RM 管理计算机共享的资源，许多软件都可以去访问这些资源，资源包含比如数据库、文件系统、打印机服务器等。 事务管理器（Transaction M">
<meta property="og:locale" content="zh_CN">
<meta property="og:image" content="https://img-blog.csdnimg.cn/20190214135801720.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0xpdHRsZV9meGM=,size_16,color_FFFFFF,t_70">
<meta property="og:image" content="https://img-blog.csdnimg.cn/2019021413581599.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0xpdHRsZV9meGM=,size_16,color_FFFFFF,t_70">
<meta property="article:published_time" content="2019-05-06T12:24:07.000Z">
<meta property="article:modified_time" content="2021-03-25T13:15:48.976Z">
<meta property="article:author" content="一年春又来">
<meta property="article:tag" content="mysql">
<meta property="article:tag" content="分布式事务">
<meta name="twitter:card" content="summary">
<meta name="twitter:image" content="https://img-blog.csdnimg.cn/20190214135801720.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0xpdHRsZV9meGM=,size_16,color_FFFFFF,t_70">


<link rel="canonical" href="http://littlefxc.github.io/2019/05/06/MySQL%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1%E5%8E%9F%E7%90%86%E6%8E%A2%E7%A9%B6/">


<script class="page-configurations">
  // https://hexo.io/docs/variables.html
  CONFIG.page = {
    sidebar: "",
    isHome : false,
    isPost : true,
    lang   : 'zh-CN'
  };
</script>
<title>MySQL分布式事务原理探究 | 一年春又来</title>
  




  <noscript>
  <style>
  body { margin-top: 2rem; }

  .use-motion .menu-item,
  .use-motion .sidebar,
  .use-motion .post-block,
  .use-motion .pagination,
  .use-motion .comments,
  .use-motion .post-header,
  .use-motion .post-body,
  .use-motion .collection-header {
    visibility: visible;
  }

  .use-motion .header,
  .use-motion .site-brand-container .toggle,
  .use-motion .footer { opacity: initial; }

  .use-motion .site-title,
  .use-motion .site-subtitle,
  .use-motion .custom-logo-image {
    opacity: initial;
    top: initial;
  }

  .use-motion .logo-line {
    transform: scaleX(1);
  }

  .search-pop-overlay, .sidebar-nav { display: none; }
  .sidebar-panel { display: block; }
  </style>
</noscript>

<link rel="alternate" href="/atom.xml" title="一年春又来" type="application/atom+xml">
</head>

<body itemscope itemtype="http://schema.org/WebPage" class="use-motion">
  <div class="headband"></div>

  <main class="main">
    <header class="header" itemscope itemtype="http://schema.org/WPHeader">
      <div class="header-inner"><div class="site-brand-container">
  <div class="site-nav-toggle">
    <div class="toggle" aria-label="切换导航栏" role="button">
        <span class="toggle-line"></span>
        <span class="toggle-line"></span>
        <span class="toggle-line"></span>
    </div>
  </div>

  <div class="site-meta">

    <a href="/" class="brand" rel="start">
      <i class="logo-line"></i>
      <h1 class="site-title">一年春又来</h1>
      <i class="logo-line"></i>
    </a>
  </div>

  <div class="site-nav-right">
    <div class="toggle popup-trigger">
        <i class="fa fa-search fa-fw fa-lg"></i>
    </div>
  </div>
</div>



<nav class="site-nav">
  <ul class="main-menu menu">
        <li class="menu-item menu-item-home"><a href="/" rel="section"><i class="home                          //首页 fa-fw"></i>首页</a></li>
        <li class="menu-item menu-item-archives"><a href="/archives/" rel="section"><i class="archive          //归档 fa-fw"></i>归档</a></li>
        <li class="menu-item menu-item-categories"><a href="/categories/" rel="section"><i class="th           //分类 fa-fw"></i>分类</a></li>
        <li class="menu-item menu-item-tags"><a href="/tags/" rel="section"><i class="tags                     //标签 fa-fw"></i>标签</a></li>
      <li class="menu-item menu-item-search">
        <a role="button" class="popup-trigger"><i class="fa fa-search fa-fw"></i>搜索
        </a>
      </li>
  </ul>
</nav>



  <div class="search-pop-overlay">
    <div class="popup search-popup"><div class="search-header">
  <span class="search-icon">
    <i class="fa fa-search"></i>
  </span>
  <div class="search-input-container">
    <input autocomplete="off" autocapitalize="off" maxlength="80"
           placeholder="搜索..." spellcheck="false"
           type="search" class="search-input">
  </div>
  <span class="popup-btn-close" role="button">
    <i class="fa fa-times-circle"></i>
  </span>
</div>
<div class="search-result-container no-result">
  <div class="search-result-icon">
    <i class="fa fa-spinner fa-pulse fa-5x"></i>
  </div>
</div>

    </div>
  </div>

</div>
        
  
  <div class="toggle sidebar-toggle" role="button">
    <span class="toggle-line"></span>
    <span class="toggle-line"></span>
    <span class="toggle-line"></span>
  </div>

  <aside class="sidebar">

    <div class="sidebar-inner sidebar-nav-active sidebar-toc-active">
      <ul class="sidebar-nav">
        <li class="sidebar-nav-toc">
          文章目录
        </li>
        <li class="sidebar-nav-overview">
          站点概览
        </li>
      </ul>

      <div class="sidebar-panel-container">
        <!--noindex-->
        <div class="post-toc-wrap sidebar-panel">
            <div class="post-toc animated"><ol class="nav"><li class="nav-item nav-level-1"><a class="nav-link" href="#MySQL-%E4%B8%AD%E5%9F%BA%E4%BA%8E-XA-%E5%AE%9E%E7%8E%B0%E7%9A%84%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1-%E5%AD%A6%E4%B9%A0%E8%AE%B0%E5%BD%95"><span class="nav-text">MySQL 中基于 XA 实现的分布式事务-学习记录</span></a><ol class="nav-child"><li class="nav-item nav-level-2"><a class="nav-link" href="#XA-%E5%8D%8F%E8%AE%AE"><span class="nav-text">XA 协议</span></a></li><li class="nav-item nav-level-2"><a class="nav-link" href="#MySQL-%E5%AE%9E%E7%8E%B0-XA"><span class="nav-text">MySQL 实现 XA</span></a><ol class="nav-child"><li class="nav-item nav-level-3"><a class="nav-link" href="#maven-%E4%BE%9D%E8%B5%96"><span class="nav-text">maven 依赖</span></a></li><li class="nav-item nav-level-3"><a class="nav-link" href="#Java-%E4%BB%A3%E7%A0%81%E5%AE%9E%E7%8E%B0"><span class="nav-text">Java 代码实现</span></a></li></ol></li><li class="nav-item nav-level-2"><a class="nav-link" href="#%E9%97%AE%E9%A2%98%E8%AE%B0%E5%BD%95"><span class="nav-text">问题记录</span></a></li></ol></li></ol></div>
        </div>
        <!--/noindex-->

        <div class="site-overview-wrap sidebar-panel">
          <div class="site-author site-overview-item animated" itemprop="author" itemscope itemtype="http://schema.org/Person">
  <p class="site-author-name" itemprop="name">一年春又来</p>
  <div class="site-description" itemprop="description"></div>
</div>
<div class="site-state-wrap site-overview-item animated">
  <nav class="site-state">
      <div class="site-state-item site-state-posts">
          <a href="/archives/">
        
          <span class="site-state-item-count">234</span>
          <span class="site-state-item-name">日志</span>
        </a>
      </div>
      <div class="site-state-item site-state-categories">
            <a href="/categories/">
          
        <span class="site-state-item-count">38</span>
        <span class="site-state-item-name">分类</span></a>
      </div>
      <div class="site-state-item site-state-tags">
            <a href="/tags/">
          
        <span class="site-state-item-count">125</span>
        <span class="site-state-item-name">标签</span></a>
      </div>
  </nav>
</div>



        </div>
      </div>
    </div>
  </aside>
  <div class="sidebar-dimmer"></div>


    </header>

    
  <div class="back-to-top" role="button">
    <i class="fa fa-arrow-up"></i>
    <span>0%</span>
  </div>

<noscript>
  <div class="noscript-warning">Theme NexT works best with JavaScript enabled</div>
</noscript>


    <div class="main-inner post posts-expand">


  


<div class="post-block">
  
  

  <article itemscope itemtype="http://schema.org/Article" class="post-content" lang="zh-CN">
    <link itemprop="mainEntityOfPage" href="http://littlefxc.github.io/2019/05/06/MySQL%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1%E5%8E%9F%E7%90%86%E6%8E%A2%E7%A9%B6/">

    <span hidden itemprop="author" itemscope itemtype="http://schema.org/Person">
      <meta itemprop="image" content="/images/avatar.gif">
      <meta itemprop="name" content="一年春又来">
      <meta itemprop="description" content="">
    </span>

    <span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization">
      <meta itemprop="name" content="一年春又来">
    </span>
      <header class="post-header">
        <h1 class="post-title" itemprop="name headline">
          MySQL分布式事务原理探究
        </h1>

        <div class="post-meta-container">
          <div class="post-meta">
    <span class="post-meta-item">
      <span class="post-meta-item-icon">
        <i class="far fa-calendar"></i>
      </span>
      <span class="post-meta-item-text">发表于</span>

      <time title="创建时间：2019-05-06 20:24:07" itemprop="dateCreated datePublished" datetime="2019-05-06T20:24:07+08:00">2019-05-06</time>
    </span>
      <span class="post-meta-item">
        <span class="post-meta-item-icon">
          <i class="far fa-calendar-check"></i>
        </span>
        <span class="post-meta-item-text">更新于</span>
        <time title="修改时间：2021-03-25 21:15:48" itemprop="dateModified" datetime="2021-03-25T21:15:48+08:00">2021-03-25</time>
      </span>
    <span class="post-meta-item">
      <span class="post-meta-item-icon">
        <i class="far fa-folder"></i>
      </span>
      <span class="post-meta-item-text">分类于</span>
        <span itemprop="about" itemscope itemtype="http://schema.org/Thing">
          <a href="/categories/Java/" itemprop="url" rel="index"><span itemprop="name">Java</span></a>
        </span>
    </span>

  
</div>

        </div>
      </header>

    
    
    
    <div class="post-body" itemprop="articleBody">
        <p>分布式事务处理的XA规范(由 AP、RM、TM 组成):</p>
<ul>
<li>其中应用程序（Application Program ，简称 AP）：AP 定义事务边界（定义事务开始和结束）并访问事务边界内的资源。</li>
<li>资源管理器（Resource Manager，简称 RM）：RM 管理计算机共享的资源，许多软件都可以去访问这些资源，资源包含比如数据库、文件系统、打印机服务器等。</li>
<li>事务管理器（Transaction Manager ，简称TM）：负责管理全局事务，分配事务唯一标识，监控事务的执行进度，并负责事务的提交、回滚、失败恢复等。</li>
</ul>
<span id="more"></span>

<h1 id="MySQL-中基于-XA-实现的分布式事务-学习记录"><a href="#MySQL-中基于-XA-实现的分布式事务-学习记录" class="headerlink" title="MySQL 中基于 XA 实现的分布式事务-学习记录"></a>MySQL 中基于 XA 实现的分布式事务-学习记录</h1><h2 id="XA-协议"><a href="#XA-协议" class="headerlink" title="XA 协议"></a>XA 协议</h2><p><img src="https://img-blog.csdnimg.cn/20190214135801720.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0xpdHRsZV9meGM=,size_16,color_FFFFFF,t_70" alt="在这里插入图片描述"></p>
<p>分布式事务处理的XA规范(由 AP、RM、TM 组成):</p>
<ul>
<li>其中应用程序（Application Program ，简称 AP）：AP 定义事务边界（定义事务开始和结束）并访问事务边界内的资源。</li>
<li>资源管理器（Resource Manager，简称 RM）：RM 管理计算机共享的资源，许多软件都可以去访问这些资源，资源包含比如数据库、文件系统、打印机服务器等。</li>
<li>事务管理器（Transaction Manager ，简称TM）：负责管理全局事务，分配事务唯一标识，监控事务的执行进度，并负责事务的提交、回滚、失败恢复等。</li>
</ul>
<p>XA 主要规定了 RM 与 TM 之间的交互，下面来看下 XA 规范中定义的 RM 和 TM 交互的接口：</p>
<p><img src="https://img-blog.csdnimg.cn/2019021413581599.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0xpdHRsZV9meGM=,size_16,color_FFFFFF,t_70" alt="在这里插入图片描述"></p>
<ul>
<li>xa_start 负责开启或者恢复一个事务分支，并且关联 XID 到调用线程</li>
<li>xa_end 负责取消当前线程与事务分支的关联</li>
<li>xa_prepare 负责询问 RM 是否准备好了提交事务分支</li>
<li>xa_commit 通知 RM 提交事务分支</li>
<li>xa_rollback 通知 RM 回滚事务分支</li>
</ul>
<p>XA 协议是使用了二阶段协议的，其中：</p>
<ul>
<li>第一阶段 TM 要求所有的 RM 准备提交对应的事务分支，询问 RM 是否有能力保证成功的提交事务分支，RM 根据自己的情况，如果判断自己进行的工作可以被提交，那就就对工作内容进行持久化，并给 TM 回执 OK；否者给 TM 的回执 NO。RM 在发送了否定答复并回滚了已经的工作后，就可以丢弃这个事务分支信息了。</li>
<li>第二阶段 TM 根据阶段 1 各个 RM prepare 的结果，决定是提交还是回滚事务。如果所有的 RM 都 prepare 成功，那么 TM 通知所有的 RM 进行提交；如果有 RM prepare 回执 NO 的话，则 TM 通知所有 RM 回滚自己的事务分支。</li>
</ul>
<p>也就是 TM 与 RM 之间是通过两阶段提交协议进行交互的。</p>
<h2 id="MySQL-实现-XA"><a href="#MySQL-实现-XA" class="headerlink" title="MySQL 实现 XA"></a>MySQL 实现 XA</h2><p>确认下 MySQL 是否启动了 XA 功能：<code>show variables like &#39;innodb_support_xa&#39;</code></p>
<h3 id="maven-依赖"><a href="#maven-依赖" class="headerlink" title="maven 依赖"></a>maven 依赖</h3><figure class="highlight xml"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br></pre></td><td class="code"><pre><span class="line"><span class="tag">&lt;<span class="name">dependencies</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>mysql<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>mysql-connector-java<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">version</span>&gt;</span>8.0.15<span class="tag">&lt;/<span class="name">version</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;<span class="name">dependency</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">groupId</span>&gt;</span>javax.transaction<span class="tag">&lt;/<span class="name">groupId</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">artifactId</span>&gt;</span>jta<span class="tag">&lt;/<span class="name">artifactId</span>&gt;</span></span><br><span class="line">        <span class="tag">&lt;<span class="name">version</span>&gt;</span>1.1<span class="tag">&lt;/<span class="name">version</span>&gt;</span></span><br><span class="line">    <span class="tag">&lt;/<span class="name">dependency</span>&gt;</span></span><br><span class="line"><span class="tag">&lt;/<span class="name">dependencies</span>&gt;</span></span><br></pre></td></tr></table></figure>

<h3 id="Java-代码实现"><a href="#Java-代码实现" class="headerlink" title="Java 代码实现"></a>Java 代码实现</h3><p>如下代码是对两个数据库进行转账操作</p>
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.littlefxc.examples.mysqlxa2pc;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> com.mysql.cj.jdbc.MysqlXADataSource;</span><br><span class="line"><span class="keyword">import</span> com.mysql.cj.jdbc.MysqlXid;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> javax.sql.XAConnection;</span><br><span class="line"><span class="keyword">import</span> javax.transaction.xa.XAException;</span><br><span class="line"><span class="keyword">import</span> javax.transaction.xa.XAResource;</span><br><span class="line"><span class="keyword">import</span> javax.transaction.xa.Xid;</span><br><span class="line"><span class="keyword">import</span> java.sql.Connection;</span><br><span class="line"><span class="keyword">import</span> java.sql.SQLException;</span><br><span class="line"><span class="keyword">import</span> java.sql.Statement;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span> fengxuechao</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">XaExample</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">main</span><span class="params">(String[] args)</span> <span class="keyword">throws</span> SQLException, XAException </span>&#123;</span><br><span class="line">        String url1 = <span class="string">&quot;jdbc:mysql://192.168.120.63:3306/learn?useSSL=false&amp;serverTimezone=UTC&quot;</span>;</span><br><span class="line">        String url2 = <span class="string">&quot;jdbc:mysql://192.168.120.63:3306/learn2?useSSL=false&amp;serverTimezone=UTC&quot;</span>;</span><br><span class="line">        String url3 = <span class="string">&quot;jdbc:mysql://localhost:3306/learn?useSSL=false&amp;serverTimezone=UTC&quot;</span>;</span><br><span class="line"></span><br><span class="line">        <span class="comment">// 从不同的数据库获取数据库数据源</span></span><br><span class="line">        MysqlXADataSource ds1 = getDataSource(url1, <span class="string">&quot;root&quot;</span>, <span class="string">&quot;123456&quot;</span>);</span><br><span class="line">        MysqlXADataSource ds2 = getDataSource(url2, <span class="string">&quot;root&quot;</span>, <span class="string">&quot;123456&quot;</span>);</span><br><span class="line"></span><br><span class="line">        <span class="comment">// 数据库1获取连接</span></span><br><span class="line">        XAConnection xAConn1 = ds1.getXAConnection();</span><br><span class="line">        Connection conn1 = xAConn1.getConnection();</span><br><span class="line">        XAResource xaResource1 = xAConn1.getXAResource();</span><br><span class="line">        Statement statement1 = conn1.createStatement();</span><br><span class="line"></span><br><span class="line">        <span class="comment">// 数据库2获取连接</span></span><br><span class="line">        XAConnection xAConn2 = ds2.getXAConnection();</span><br><span class="line">        Connection conn2 = xAConn2.getConnection();</span><br><span class="line">        XAResource xaResource2 = xAConn2.getXAResource();</span><br><span class="line">        Statement statement2 = conn2.createStatement();</span><br><span class="line"></span><br><span class="line">        <span class="comment">// 其中 xid 是一个全局唯一的 id 标示一个分支事务，每个分支事务有自己的全局唯一的一个 id。</span></span><br><span class="line">        Xid xid1 = <span class="keyword">new</span> MysqlXid(<span class="keyword">new</span> <span class="keyword">byte</span>[]&#123;<span class="number">0x01</span>&#125;, <span class="keyword">new</span> <span class="keyword">byte</span>[]&#123;<span class="number">0x02</span>&#125;, <span class="number">100</span>);</span><br><span class="line">        Xid xid2 = <span class="keyword">new</span> MysqlXid(<span class="keyword">new</span> <span class="keyword">byte</span>[]&#123;<span class="number">0x011</span>&#125;, <span class="keyword">new</span> <span class="keyword">byte</span>[]&#123;<span class="number">0x012</span>&#125;, <span class="number">100</span>);</span><br><span class="line"></span><br><span class="line">        <span class="keyword">try</span> &#123;</span><br><span class="line">            <span class="comment">// 事务分支1关联事务sql语句</span></span><br><span class="line">            xaResource1.start(xid1, XAResource.TMNOFLAGS);</span><br><span class="line">            <span class="keyword">int</span> update1 = statement1.executeUpdate(<span class="string">&quot;update account_from set money = money - 0.5 where id = 1&quot;</span>);</span><br><span class="line">            xaResource1.end(xid1, XAResource.TMSUCCESS);</span><br><span class="line"></span><br><span class="line">            <span class="comment">// 事务分支2关联事务sql语句</span></span><br><span class="line">            xaResource2.start(xid2, XAResource.TMNOFLAGS);</span><br><span class="line">            <span class="keyword">int</span> update2 = statement2.executeUpdate(<span class="string">&quot;update account_to set money = money + 0.5 where id = 1&quot;</span>);</span><br><span class="line">            xaResource2.end(xid2, XAResource.TMSUCCESS);</span><br><span class="line"></span><br><span class="line">            <span class="comment">// 两阶段提交协议第一阶段</span></span><br><span class="line">            <span class="keyword">int</span> ret1 = xaResource1.prepare(xid1);</span><br><span class="line">            <span class="keyword">int</span> ret2 = xaResource2.prepare(xid2);</span><br><span class="line"></span><br><span class="line">            <span class="comment">// 两阶段提交协议第二阶段</span></span><br><span class="line">            <span class="keyword">if</span> (XAResource.XA_OK == ret1 &amp;&amp; XAResource.XA_OK == ret2) &#123;</span><br><span class="line">                xaResource1.commit(xid1, <span class="keyword">false</span>);</span><br><span class="line">                xaResource2.commit(xid2, <span class="keyword">false</span>);</span><br><span class="line">                System.out.println(<span class="string">&quot;result:&quot;</span> + update1 + <span class="string">&quot;, result2:&quot;</span> + update2);</span><br><span class="line">            &#125;</span><br><span class="line">        &#125; <span class="keyword">catch</span> (XAException e) &#123;</span><br><span class="line">            xaResource1.rollback(xid1);</span><br><span class="line">            xaResource2.rollback(xid2);</span><br><span class="line">            e.printStackTrace();</span><br><span class="line">        &#125;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 获取 MysqlXADataSource</span></span><br><span class="line"><span class="comment">     *</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> url</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> username</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@param</span> password</span></span><br><span class="line"><span class="comment">     * <span class="doctag">@return</span></span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> MysqlXADataSource <span class="title">getDataSource</span><span class="params">(String url, String username, String password)</span> </span>&#123;</span><br><span class="line">        MysqlXADataSource dataSource = <span class="keyword">new</span> MysqlXADataSource();</span><br><span class="line">        dataSource.setUrl(url);</span><br><span class="line">        dataSource.setUser(username);</span><br><span class="line">        dataSource.setPassword(password);</span><br><span class="line">        <span class="keyword">return</span> dataSource;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure>

<h2 id="问题记录"><a href="#问题记录" class="headerlink" title="问题记录"></a>问题记录</h2><p>MySQL 8.x版本更新安全插件 <code>mysql_native_password</code> 变为 <code>caching_sha2_password</code></p>
<p>Unable to load authentication plugin ‘caching_sha2_password’.</p>
<p>解决办法：升级 <code>mysql-connector-java</code> 依赖的版本。</p>

    </div>

    
    
    

    <footer class="post-footer">
          <div class="post-tags">
              <a href="/tags/mysql/" rel="tag"># mysql</a>
              <a href="/tags/%E5%88%86%E5%B8%83%E5%BC%8F%E4%BA%8B%E5%8A%A1/" rel="tag"># 分布式事务</a>
          </div>

        

          <div class="post-nav">
            <div class="post-nav-item">
                <a href="/2019/05/06/%E6%97%A5%E5%BF%97%E5%86%99%E5%85%A5%E6%95%B0%E6%8D%AE%E5%BA%93Logback-JDBCAppender/" rel="prev" title="日志写入数据库Logback-JDBCAppender">
                  <i class="fa fa-chevron-left"></i> 日志写入数据库Logback-JDBCAppender
                </a>
            </div>
            <div class="post-nav-item">
                <a href="/2019/05/07/Java%E5%B9%B6%E5%8F%91%E5%AD%A6%E4%B9%A0%E8%AE%B0%E5%BD%95%E4%B9%8Bsynchronized/" rel="next" title="Java并发学习记录之synchronized">
                  Java并发学习记录之synchronized <i class="fa fa-chevron-right"></i>
                </a>
            </div>
          </div>
    </footer>
  </article>
</div>







<script>
  window.addEventListener('tabs:register', () => {
    let { activeClass } = CONFIG.comments;
    if (CONFIG.comments.storage) {
      activeClass = localStorage.getItem('comments_active') || activeClass;
    }
    if (activeClass) {
      const activeTab = document.querySelector(`a[href="#comment-${activeClass}"]`);
      if (activeTab) {
        activeTab.click();
      }
    }
  });
  if (CONFIG.comments.storage) {
    window.addEventListener('tabs:click', event => {
      if (!event.target.matches('.tabs-comment .tab-content .tab-pane')) return;
      const commentClass = event.target.classList[1];
      localStorage.setItem('comments_active', commentClass);
    });
  }
</script>
</div>
  </main>

  <footer class="footer">
    <div class="footer-inner">


<div class="copyright">
  &copy; 
  <span itemprop="copyrightYear">2022</span>
  <span class="with-love">
    <i class="fa fa-heart"></i>
  </span>
  <span class="author" itemprop="copyrightHolder">一年春又来</span>
</div>
  <div class="powered-by">由 <a href="https://hexo.io/" class="theme-link" rel="noopener" target="_blank">Hexo</a> & <a href="https://theme-next.js.org/mist/" class="theme-link" rel="noopener" target="_blank">NexT.Mist</a> 强力驱动
  </div>

    </div>
  </footer>

  
  <script src="https://cdn.jsdelivr.net/npm/animejs@3.2.1/lib/anime.min.js"></script>
<script src="/js/utils.js"></script><script src="/js/motion.js"></script><script src="/js/schemes/muse.js"></script><script src="/js/next-boot.js"></script>

  
<script src="/js/local-search.js"></script>






  





</body>
</html>
